consinit.c revision 1.8
1 /* $NetBSD: consinit.c,v 1.8 2000/09/28 15:23:06 eeh Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 Eduardo E. Horvath 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include "opt_ddb.h" 32 #include "pcons.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/file.h> 39 #include <sys/ioctl.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 #include <sys/tty.h> 43 #include <sys/time.h> 44 #include <sys/syslog.h> 45 46 #include <machine/autoconf.h> 47 #include <machine/openfirm.h> 48 #include <machine/bsd_openprom.h> 49 #include <machine/conf.h> 50 #include <machine/cpu.h> 51 #include <machine/eeprom.h> 52 #include <machine/psl.h> 53 #include <machine/z8530var.h> 54 55 #include <dev/cons.h> 56 57 #include <sparc64/dev/cons.h> 58 59 static void prom_cnprobe __P((struct consdev *)); 60 static void prom_cninit __P((struct consdev *)); 61 int prom_cngetc __P((dev_t)); 62 static void prom_cnputc __P((dev_t, int)); 63 static void prom_cnpollc __P((dev_t, int)); 64 static void prom_cnputc __P((dev_t, int)); 65 66 int stdin = NULL, stdout = NULL; 67 68 /* 69 * The console is set to this one initially, 70 * which lets us use the PROM until consinit() 71 * is called to select a real console. 72 */ 73 struct consdev consdev_prom = { 74 prom_cnprobe, 75 prom_cninit, 76 prom_cngetc, 77 prom_cnputc, 78 prom_cnpollc, 79 NULL, 80 }; 81 82 /* 83 * The console table pointer is statically initialized 84 * to point to the PROM (output only) table, so that 85 * early calls to printf will work. 86 */ 87 struct consdev *cn_tab = &consdev_prom; 88 89 void 90 prom_cnprobe(cd) 91 struct consdev *cd; 92 { 93 #if NPCONS > 0 94 int maj; 95 96 for (maj = 0; maj < nchrdev; maj++) 97 if (cdevsw[maj].d_open == pconsopen) 98 break; 99 cd->cn_dev = makedev(maj, 0); 100 cd->cn_pri = CN_INTERNAL; 101 #endif 102 } 103 104 int 105 prom_cngetc(dev) 106 dev_t dev; 107 { 108 unsigned char ch = '\0'; 109 int l; 110 #ifdef DDB 111 static int nplus = 0; 112 #endif 113 114 while ((l = OF_read(stdin, &ch, 1)) != 1) 115 /* void */; 116 #ifdef DDB 117 if (ch == '+') { 118 if (nplus++ > 3) Debugger(); 119 } else nplus = 0; 120 #endif 121 if (ch == '\r') 122 ch = '\n'; 123 return ch; 124 } 125 126 static void 127 prom_cninit(cn) 128 struct consdev *cn; 129 { 130 if (!stdin) stdin = OF_stdin(); 131 if (!stdout) stdout = OF_stdout(); 132 } 133 134 /* 135 * PROM console output putchar. 136 */ 137 static void 138 prom_cnputc(dev, c) 139 dev_t dev; 140 int c; 141 { 142 int s; 143 char c0 = (c & 0x7f); 144 145 #if 0 146 if (!stdout) stdout = OF_stdout(); 147 #endif 148 s = splhigh(); 149 OF_write(stdout, &c0, 1); 150 splx(s); 151 } 152 153 void 154 prom_cnpollc(dev, on) 155 dev_t dev; 156 int on; 157 { 158 if (on) { 159 /* Entering debugger. */ 160 #if NFB > 0 161 fb_unblank(); 162 #endif 163 } else { 164 /* Resuming kernel. */ 165 } 166 #if NPCONS > 0 167 pcons_cnpollc(dev, on); 168 #endif 169 } 170 171 /*****************************************************************/ 172 173 #ifdef DEBUG 174 #define DBPRINT(x) prom_printf x 175 #else 176 #define DBPRINT(x) 177 #endif 178 179 /* 180 * This function replaces sys/dev/cninit.c 181 * Determine which device is the console using 182 * the PROM "input source" and "output sink". 183 */ 184 void 185 consinit() 186 { 187 register int chosen; 188 char buffer[128]; 189 extern int stdinnode, fbnode; 190 char *consname = "unknown"; 191 192 DBPRINT(("consinit()\r\n")); 193 if (cn_tab != &consdev_prom) return; 194 195 DBPRINT(("setting up stdin\r\n")); 196 chosen = OF_finddevice("/chosen"); 197 OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)); 198 DBPRINT(("stdin instance = %x\r\n", stdin)); 199 200 if ((stdinnode = OF_instance_to_package(stdin)) == 0) { 201 printf("WARNING: no PROM stdin\n"); 202 } 203 204 DBPRINT(("setting up stdout\r\n")); 205 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 206 207 DBPRINT(("stdout instance = %x\r\n", stdout)); 208 209 if ((fbnode = OF_instance_to_package(stdout)) == 0) 210 printf("WARNING: no PROM stdout\n"); 211 212 DBPRINT(("stdout package = %x\r\n", fbnode)); 213 214 if (stdinnode && (OF_getproplen(stdinnode,"keyboard") >= 0)) { 215 #if NKBD > 0 216 printf("cninit: kdb/display not configured\n"); 217 #endif 218 consname = "keyboard/display"; 219 } else if (fbnode && 220 (OF_instance_to_path(stdinnode, buffer, sizeof(buffer) >= 0))) { 221 consname = buffer; 222 } 223 printf("console is %s\n", consname); 224 225 /* Initialize PROM console */ 226 (*cn_tab->cn_probe)(cn_tab); 227 (*cn_tab->cn_init)(cn_tab); 228 } 229 230
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